package com.example.demo.customer;
import com.example.demo.exception.NotFoundException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import java.util.List;

@Service
public  class CustomerService{

 private final  static Logger LOGGER = LoggerFactory.getLogger(CustomerService.class);

 private  final CustomerRepository customerRepository;

 @Autowired
 public  CustomerService(CustomerRepository customerRepository) { this.customerRepository=customerRepository;}


 List<Customer> getCustomers(){
  LOGGER.info("getCustomers caller");
  return customerRepository.findAll();
 }


 Customer getCustomer(Long id){
   return customerRepository
         .findById(id)
          .orElseThrow(() -> {
   NotFoundException notFoundException = new NotFoundException("customer"+ id +"无法找到");
        LOGGER.error("error :getCustomer {}" + id, notFoundException);
         return notFoundException;
       });
   }
 }